Method for sawing tapered logs.



T RO'DES. METHOD FOR SAWING TAPERED LOGS.

APPLICATION FILED AUG-25, 1914.

Patented July 13,1915.

l/VVE/V r09 EOJPJ A TTOR/VEYS TYBEE BODIES, OF NASHVILLE, TENNESSEE.

METHOD FOR sawme TAPERED LOGS.

Specification of Letters Patent.

Patented July 13, 1915.

Application filed August 25, 1914. Serial No. 858,456.

To all whom it may concern: Be it known that I, TYREE Bonus, a citi- -zen of the United States, and a resident of a lesser manipulation of they same thanhitherto.

My method consists in cutting a tapered log so as to form a flattened frustocone, which is then trimmed by cutting off boards from the sloping sides parallelly to the slope of said sides.

Reference is to be had to the accompanying drawings forming a part of this specification, in which like characters indicate corresponding parts in all the views and in which Figure 1 illustrates the method employed at present for sawing tapered logs; and Figs. 2 and 3 show my method of sawing tapered s.

The met 0d of sawing logs employed at present consists in sawing the tapering log from the beginning to the end parallel to the axis of the log (see Fig. 1), that is, forming the frustocone-shaped log into a quadrangular prism, thus sawing off tapering boards 1, 2 and 8, which must be edged off, to form straight boards and, conse quently, cause great waste.

In my method, shown in Figs. 2 and 3, I

' first saw or trim the frustocone-shape'd log by sawing off the slab a and the board Z2 parallelly to the slope of the log, so as to form diametrically opposite converging sides which are then trimmed by cutting 0d boards 0, d and e parallelly to the axis of the log, shaped log a flattened frustocone in which the flattened sides are parallel. The slab a and the board I) so sawed oil are substantially of the same width from end to end and, therefore, I) can be utilized as a board with very little edge trimming. The boards thus forming from the frustocone a, d and 6 cut from each of said sides of the log are trimmed by removing the parts f. The so flattened frustocone is thencut into boards by sawin off the boards parallelly to the slopes 9 rom each side toward the center, as shown best in Fig. 3. By this method boards h, i, j and is are formed in the center of the log. In the boards h, i, j and k the portions f are also removed. so that the only waste with my method is the portions f and f.

By my method of sawing a tapered log. I cut ofi short boards from the inside of the log, 11. 6., from the broadest surface necessary to; size up the cant so it will be the same size at both ends. Furthermore, by my method I make no tapered boards, as all boards have parallel edges at both ends when out from a tapered log. By cutting the short boards from the inside broader surface, they measure about four times the width as the same out from the outside of the log, as shown in Fig. 1. By my method also the boards, including the short ones, are

so cut that they are either all sap or all heart, that is to say no board has one end sap and the other end heart, and consequently, there is no mixing of the grades in a board. With my method the gain in lumher on a log twenty' four inches at the small end, thirty inches at the large end and sixteen feet long is about seventy-five feet.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. The method of sawing tapered log consisting in cutting the log parallelly to the slope, so as to form diametrically oppo site sloping sides to substantially the square of the log, then cutting off boards from the so formed sides parallelly to the axis of the log, thus forming a flattened frustocone, the flattened sides of which are parallel, then cutting the flattened frustocone into boards from each of the sloping sides parallellv to the slo e of said sides and substantially perpen icular to the parallel sides.

2. The method of sawing tapered logs, consisting in cutting the log parallelly to the slope, so as to form diametrically opposite 'slopingsides to substantially the square name to this specification in' the presence of of the'log, and then cutting off boards from two subscribing witnesses.

the se formed sides'parallelly to the axis of TYREE RODES. the log, thus fprming a flattened frustocone, Witnesses *5 .the flattened sldes of WhlCh are parallel. Loms KRAMER,r

I In testimony whereof I have signed my Jos. F. KRAMER. 

